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| Research on high-sensitivity and wide-band receiver used in acoustic well logging |
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WU Jinping1,2, QIAO Wenxiao1,2, CHE Xiaohua1,2
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(1.State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;2.Key Laboratory of Earth Prospecting and Information Technology in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| Investigations on a high-sensitivity and wide-band receiver used in acoustic well logging are conducted combining finite element methods and experimental measurements. The optimization analysis on the receiver by ANSYS shows that the length and thickness of ceramic plates have major effects on the receiver performance characteristics. The operating frequency bandwidth broadens as the length of ceramic plates decreases, and the receiving sensitivity improves as the thickness of ceramic plates increases. Furthermore, the receiving performance of the optimized receiver is simulated by ANSYS, and its performance indices are obtained. In the operating frequency bandwidth from 1 kHz to 30 kHz, the average of receiving sensitivity is -204.85 dB and the sensitivity fluctuation is less than 2.3 dB. According to the optimized structural parameters of the receiver, a prototype is fabricated and measured in a water tank. The experimentally measurements are in good agreement with the calculated results, supporting the high sensitivity and wide bandwidth of the receiver. |
| Key words: acoustic logging receiver operating frequency receiving sensitivity |
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